Experimental Study On The Law Of Nutrient Leaching And Accumulation In Soils Under Supplying Groundwater Resources Through Floodwater Irrigation

In this paper, depended on Shanxi water scientific research item in 2003 of- "Study on the supplying groundwater resources through floodwater irrigation", based on the field experiment in Yuhe irrigation district in Datong, Shanxi province in 2004 and 2005, through the methods that floodwater irrigation compares with clear water irrigation under different irrigation norms, the characteristics of nutrient (nitrogen, phosphorus, potassium and organic matter) leaching and accumulation in soils; the difference on the characteristics of nutrient leaching and accumulation in soils under two conditions of flood water irrigation and clear water irrigation; the irrigation norms of supplying groundwater resources by floodwater irrigation and the economic profit on supplying groundwater resources by floodwater irrigation has been analyzed and discussed. The results indicated that:1. Under floodwater irrigation conditions, the nutrient leaching and...